Oil-burning furnace.



E. w. THOMAS. OIL BURNINGIURNAGE. APPLICATION FILED JAN. 25, 1911. RENEWED NOV. 26, 1912..

31 Patented Jan.21,1913.

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o o 0 0 o o o o 0 O o o 0 o o o o o o o o o o o 0 o o o ofo o o o o. o o o 0' o o o o o 0 o o o o o o 'o 0 o o o o o o 0 1 r 1 1 7 I t l fi 4- e) G O O Q Q Q U i Q 4 o .3 Suvcnhyc hairs srarss ear lQQ EDWARID W. THOMAS, OF STOCKTON, CALIFORNIfA, ASSIGNOB, BY MESITE ASSIGN- MENTS, TO '1. B. LITTLETON,. 0F STOCKTON, CALIFORNIA.

OIL-BURNING FURNACE.

Specification of Letterslatent.

Patented 5,111.21, 1913.

Application filed January 25, 1811, Serial No. 604,591. Renewed November 26, 1912. Serial No. 733,704.

ing to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it appertains to 'inake-and use the same, reference being bad to the accompanying drawings, and to the characters of reference marked thereon, \zhich form a part of this application.

This invention relates to improvements in. fire boxes in which oil burners aroused,- l'hc object of theinvention bemg to produce a fire pan'for the same which will preheat the air passing into the fire box, thus preventing expansion and contraction due to cold air striking sheet plates and flues,

and also aiding in combustion.

further object of the invention is to produce a simple and inexpensive device,

and yet one which will be exceedingly eifective for the purposes for which it is designed.

These objects I accomplish by means of;

such structure and relative arrangement of parts as will fully appear by aperusal of the 'f()ll0\\'lllf specification and claim.

in the drawings similar characters of ref-1.

crence indicate corresponding parts in the several views.

Figure l is a rear elevation of a fire box showing my improved pan installed thereview taken on a line Y-Y of Fig. Fig. lis a perspective View partly in section showing the details of my improved fire Fig. 2 is a sectional viewtaken on a line K--X of F1". 1. F1 3 is a sectional h b orifices 3. Disposed across the pan 2 and bolted to the bottom thereof by means of bolts 4:, are cross bars 5, there being Washers. 3 interposed between the bottom 01 the pan 2- and said members 5, which washers fit over the bolts 4. Suitably disposed upon the cross members 5 are two layers of fire brick 7. This fire pan and brick construction is built up close to the end of the fire box atwhich the burner 8 is located, as at 9, and is spaced from the other end of the fire box -as at 10.

11 is a false bottom or pan disposed underneath the fire box 1 and having end dampers 12 and 13.

When the burner 8 is in operation, it, of course, heats the bricks 7 to a high degree and with the operation of the firethe air through the holes 3 and through the space under the members 5 formed by the Washers 6 holding said members 5 off the bottom of the pan 2', during which percolation the air comes into contact with the hot bricks 7 and becomes thoroughly preheated before it passes through the space v10 into the fire box.

It will, of course, be understood that the damper 12 will be open more than is the damper 13 in order to allow a greater sweep of the air over the hot surface of the bricks 7 than would be possible if a greater quan- Hlity of air was admitted through the damper 13. Thus it will be seen that all the air which passes into the fire box is preheated, and thus the objects of the invention as set forth herein are substantially fulfilled.

While this specification sets forth in detail the present and preferred construction of the device, still in practice such deviation from such detail may be resorted to as,

the invention.

Having thus described my invention what {claim as new and useful and desire to secure by Letters-Patent is A device. of the character described comprising a fire box, a channel shaped pan disposed in the bottom of said fire box and spaced from one end thereof, the bottom of do not form a departure from the spirit of is drawn into the pan 11 and percolates said pan having a plurality of orifices, a

5 disposed beneath said pan, and control dampersat each endof said air passage, as described.

In testimony whereof I affix my signature 111 presence of two Witnesses. v

. EDWARD W. THOMAS. \Vitnesses JOSHUA B. \VEBSTER, 1 FRANK H. CARTER. 

